/* VC API 公开宣传与教程共用样式；正文在无 JavaScript 时保持可读。 */
:root {
  color-scheme: dark;
  --geo-bg: #07111f;
  --geo-panel: #101e2e;
  --geo-text: #e7edf3;
  --geo-muted: #adbbc9;
  --geo-line: #293b50;
  --geo-accent: #a5d9f2;
  --geo-width: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
.geo-site { margin: 0; background: var(--geo-bg); color: var(--geo-text); font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.75; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--geo-accent); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--geo-accent); outline-offset: 6px; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
h1 { font-size: clamp(36px, 4.4vw, 62px); font-weight: 600; line-height: 1.3; letter-spacing: -.035em; }
h2 { font-size: clamp(27px, 3vw, 40px); font-weight: 550; line-height: 1.4; letter-spacing: -.035em; }
h3 { font-size: 22px; font-weight: 550; line-height: 1.5; }
p { color: var(--geo-muted); }
.geo-skip { position: fixed; top: 12px; left: 16px; z-index: 10; background: var(--geo-text); color: var(--geo-bg); padding: 12px 20px; clip-path: inset(50%); }
.geo-skip:focus { clip-path: none; }
.geo-header, .geo-section, .geo-footer, .geo-article { width: min(var(--geo-width), calc(100% - 64px)); margin-inline: auto; }
.geo-header { min-height: 92px; display: flex; align-items: center; gap: 28px; border-bottom: 1px solid var(--geo-line); }
.geo-brand { display: inline-flex; align-items: center; gap: 11px; font-size: 20px; font-weight: 650; letter-spacing: -.025em; white-space: nowrap; }
.geo-header nav { display: flex; gap: 32px; margin-inline: auto; font-size: 14px; color: var(--geo-muted); }
.geo-login { padding: 8px 15px; border: 1px solid var(--geo-line); border-radius: 6px; font-size: 14px; white-space: nowrap; }
.geo-login span { margin-left: 12px; }
.geo-hero { position: relative; overflow: hidden; min-height: 690px; display: flex; flex-direction: column; justify-content: center; isolation: isolate; }
.geo-hero-image { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; object-position: 72% 50%; opacity: .75; }
.geo-hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, var(--geo-bg) 1%, rgba(7,17,31,.9) 30%, rgba(7,17,31,.18) 78%), linear-gradient(0deg, var(--geo-bg), transparent 36%); }
.geo-hero-content, .geo-hero-bottom { width: min(var(--geo-width), calc(100% - 64px)); margin-inline: auto; }
.geo-hero-content { padding-block: 95px 65px; }
.geo-intro { color: var(--geo-accent); font-size: 14px; margin-bottom: 28px; }
.geo-lead { max-width: 500px; margin-top: 26px; font-size: 17px; line-height: 1.95; }
.geo-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 30px; }
.geo-button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 23px; border: 1px solid var(--geo-accent); border-radius: 6px; background: var(--geo-accent); color: var(--geo-bg); font-size: 14px; font-weight: 600; }
.geo-button:hover { color: var(--geo-bg); background: var(--geo-text); border-color: var(--geo-text); }
.geo-button--quiet { background: transparent; border-color: var(--geo-line); color: var(--geo-text); }
.geo-button--quiet:hover { background: var(--geo-panel); color: var(--geo-text); border-color: var(--geo-muted); }
.geo-hero-note { font-size: 12px; margin-top: 20px; }
.geo-hero-bottom { display: flex; align-items: center; flex-wrap: wrap; gap: 38px; padding-block: 30px; border-top: 1px solid var(--geo-line); font-size: 16px; color: var(--geo-muted); }
.geo-hero-bottom a { margin-left: auto; font-size: 13px; }
.geo-hero-bottom a span { padding-left: 20px; }
.geo-section { padding-block: 94px; border-bottom: 1px solid var(--geo-line); }
.geo-label { color: var(--geo-accent); font-size: 13px; margin-bottom: 17px; }
.geo-overview { display: flex; gap: 80px; }
.geo-overview > div:first-child { flex: 0 0 36%; }
.geo-overview > div:last-child { flex: 1; }
.geo-answer { color: var(--geo-text); font-size: 19px; line-height: 1.95; }
.geo-overview p + p { margin-top: 19px; font-size: 15px; }
.geo-text-link { display: inline-block; color: var(--geo-accent); text-decoration: underline; text-underline-offset: 6px; font-size: 14px; }
.geo-overview .geo-text-link { margin-top: 24px; }
.geo-section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 44px; }
.geo-section-head > p { font-size: 14px; }
.geo-workflow-list article { display: flex; align-items: center; gap: 35px; padding-block: 30px; border-top: 1px solid var(--geo-line); }
.geo-tool-symbol { flex: 0 0 76px; color: var(--geo-accent); font: 34px ui-monospace, monospace; }
.geo-workflow-list article > div { flex: 1; }
.geo-workflow-list p { font-size: 15px; margin-top: 8px; }
.geo-workflow-list a { font-size: 14px; color: var(--geo-accent); white-space: nowrap; }
.geo-guide-list { display: flex; gap: 24px; }
.geo-guide-card { flex: 1; display: flex; flex-direction: column; padding: 32px; background: var(--geo-panel); border: 1px solid var(--geo-line); border-radius: 10px; }
.geo-guide-card:hover { border-color: var(--geo-accent); color: var(--geo-text); }
.geo-guide-card-top { display: flex; justify-content: space-between; color: var(--geo-accent); font-size: 14px; }
.geo-guide-card h3 { margin-top: 32px; font-size: 30px; line-height: 1.5; }
.geo-guide-card p { margin-block: 20px 32px; font-size: 14px; }
.geo-guide-card-bottom { padding-top: 19px; margin-top: auto; border-top: 1px solid var(--geo-line); color: var(--geo-muted); font-size: 12px; }
.geo-pricing { display: flex; gap: 100px; align-items: center; }
.geo-pricing > div { flex: 1; }
.geo-pricing > div > p:not(.geo-label) { margin-top: 22px; max-width: 490px; font-size: 15px; }
.geo-price-facts { flex: 1; margin: 0; }
.geo-price-facts div { display: flex; gap: 25px; padding-block: 22px; border-bottom: 1px solid var(--geo-line); }
.geo-price-facts dt { color: var(--geo-accent); }
.geo-price-facts dd { margin: 0; color: var(--geo-muted); font-size: 14px; }
.geo-faq { display: flex; gap: 80px; }
.geo-faq > div:first-child { flex: 0 0 34%; }
.geo-faq > div:first-child > p:last-child { font-size: 14px; margin-top: 20px; }
.geo-faq > div:last-child { flex: 1; }
.geo-faq details { border-bottom: 1px solid var(--geo-line); padding-block: 19px; }
.geo-faq details:first-child { padding-top: 0; }
.geo-faq summary { cursor: pointer; font-size: 16px; padding-right: 12px; }
.geo-faq details p { font-size: 14px; padding-top: 18px; line-height: 1.9; }
.geo-last { text-align: center; padding-block: 100px; }
.geo-last > p { margin-top: 20px; }
.geo-last .geo-actions { justify-content: center; }
.geo-footer { display: flex; flex-wrap: wrap; align-items: start; justify-content: space-between; gap: 30px; padding-block: 45px 28px; }
.geo-footer p { font-size: 13px; margin-top: 10px; }
.geo-footer nav { display: flex; flex-wrap: wrap; gap: 25px; padding-top: 9px; color: var(--geo-muted); font-size: 13px; }
.geo-footer .geo-small { flex-basis: 100%; font-size: 11px; }
.geo-article { padding-block: 45px 90px; }
.geo-back { color: var(--geo-muted); font-size: 14px; }
.geo-article-head { max-width: 850px; padding-block: 46px 55px; }
.geo-article-head h1 { font-size: clamp(32px, 4vw, 50px); }
.geo-article-head .geo-answer { margin-top: 24px; font-size: 17px; }
.geo-meta { font-size: 12px; margin-top: 23px; }
.geo-article-layout { display: flex; gap: 65px; border-top: 1px solid var(--geo-line); padding-top: 40px; }
.geo-toc { flex: 0 0 200px; }
.geo-toc nav { position: sticky; top: 30px; display: flex; flex-direction: column; gap: 14px; font-size: 13px; }
.geo-toc p { color: var(--geo-text); font-weight: 600; margin-bottom: 7px; }
.geo-toc a { color: var(--geo-muted); }
.geo-toc a:hover { color: var(--geo-accent); }
.geo-prose { flex: 1; min-width: 0; max-width: 800px; }
.geo-prose section { padding-bottom: 40px; margin-bottom: 35px; border-bottom: 1px solid var(--geo-line); }
.geo-prose h2 { font-size: 26px; margin-bottom: 22px; }
.geo-prose h3 { font-size: 18px; margin-block: 25px 12px; }
.geo-prose p, .geo-prose li { font-size: 15px; line-height: 1.95; }
.geo-prose p + p { margin-top: 17px; }
.geo-prose ul, .geo-prose ol { padding-left: 23px; color: var(--geo-muted); }
.geo-prose li + li { margin-top: 12px; }
.geo-prose a:not(.geo-button) { color: var(--geo-accent); text-decoration: underline; text-underline-offset: 4px; }
.geo-prose strong { color: var(--geo-text); }
.geo-prose code { font: .88em/1.8 ui-monospace, "Cascadia Code", monospace; color: var(--geo-accent); overflow-wrap: anywhere; }
.geo-prose pre { margin-block: 18px; padding: 22px; overflow-x: auto; border: 1px solid var(--geo-line); border-radius: 7px; background: var(--geo-panel); }
.geo-prose pre code { font-size: 13px; overflow-wrap: normal; }
.geo-prose .geo-note { border-left: 2px solid var(--geo-accent); padding: 14px 20px; margin-top: 24px; background: var(--geo-panel); }
.geo-table-wrap { overflow-x: auto; }
.geo-prose table { border-collapse: collapse; width: 100%; font-size: 14px; text-align: left; }
.geo-prose th, .geo-prose td { padding: 15px 14px; border-bottom: 1px solid var(--geo-line); vertical-align: top; }
.geo-prose td { color: var(--geo-muted); }
.geo-prose td:first-child { min-width: 125px; color: var(--geo-text); }
@media (max-width: 800px) {
  .geo-header, .geo-section, .geo-footer, .geo-article, .geo-hero-content, .geo-hero-bottom { width: calc(100% - 40px); }
  .geo-header { flex-wrap: wrap; gap: 18px; padding-block: 20px 15px; }
  .geo-header nav { order: 3; flex-basis: 100%; justify-content: space-between; gap: 12px; font-size: 13px; }
  .geo-login { margin-left: auto; }
  .geo-hero { min-height: 620px; }
  .geo-hero-content { padding-block: 75px 55px; }
  .geo-hero-image { object-position: 65% center; opacity: .5; }
  .geo-hero-bottom { gap: 20px; font-size: 13px; }
  .geo-hero-bottom a { flex-basis: 100%; margin: 0; }
  .geo-section { padding-block: 58px; }
  .geo-overview, .geo-pricing, .geo-faq, .geo-section-head, .geo-guide-list { flex-direction: column; gap: 32px; align-items: stretch; }
  .geo-section-head { gap: 18px; }
  .geo-answer { font-size: 17px; }
  .geo-workflow-list article { gap: 15px; flex-wrap: wrap; }
  .geo-tool-symbol { flex-basis: 42px; font-size: 26px; }
  .geo-workflow-list article > div { flex-basis: calc(100% - 60px); }
  .geo-workflow-list article > a { margin-left: 57px; }
  .geo-guide-card { padding: 25px; }
  .geo-guide-card h3 { font-size: 27px; margin-top: 25px; }
  .geo-last { padding-block: 70px; }
  .geo-article-layout { flex-direction: column; gap: 30px; }
  .geo-toc { flex-basis: auto; }
  .geo-toc nav { position: static; flex-direction: row; flex-wrap: wrap; gap: 12px 20px; }
  .geo-toc nav > p { flex-basis: 100%; }
  .geo-prose pre { padding: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.geo-guide-more { display: flex; flex-wrap: wrap; gap: 14px 28px; margin-top: 28px; color: var(--geo-accent); font-size: 14px; }
.geo-guide-more a { text-decoration: underline; text-underline-offset: 5px; }
@media (max-width: 800px) { .geo-guide-more { gap: 14px 20px; } }